The brain is our most vital and complex organ, coordinating our actions, thoughts, and interactions with the world around us. Yet most of us know precious little about how our brains actually work, or what we can do to optimize their performance. Cognitive decline is the biggest long-term health worry for many of us, and so here James Goodwin explains how simple strategies for exercise, diet, social life, and sleep can transform your brain health paradigm, and helping you to stay sharp across your life.